Table 3. Descriptive statistics for diameter, density, and basal area of spared trees and stumps
of the preferred firewood species, and Spearman rank correlations of these variables with fallow
history, the length of the last fallow period, and the number of cycles.
| | | |
| Variable |
Mean1
|
Range
|
Spearman rank rs
|
| |
|
STUMPS
|
|
|
Fallow length
|
Number of cycles
|
| Minimum diameter (cm) |
3.1 |
3-4 |
-0.383 ns |
0.118 ns |
| Maximum diameter (cm) |
15.4 |
6.1-33 |
0.792*** |
-0.744*** |
| Mean diameter (cm) |
6.6 |
4.4-11.7 |
0.741*** |
-0.694*** |
| Density (stems/ha) |
1212 |
300-2307 |
-0.082 ns |
0.076 ns |
| Basal area (m2/ha) |
4.4 |
0.7-9.9 |
0.736*** |
-0.681*** |
|
|
|
|
|
| TREES |
|
|
|
|
| Minimum diameter (cm) |
6.0 |
2.2-11 |
0.041 ns |
-0.021 ns |
| Maximum diameter (cm) |
19.7 |
4.5-42 |
0.799*** |
-0.792*** |
| Mean diameter (cm) |
11.1 |
3.1-19.8 |
0.781*** |
-0.714*** |
| Density (stems/ha) |
237 |
43.5-954 |
-0.110 ns |
-0.012 ns |
| Basal area (m2/ha) |
2.4 |
0.15-7.8 |
0.552** |
-0.578** |
| | |
1Mean of estimates for each site (n = 25)
*P <0.05,
**P <0.01, ***P <0.001, ns = not significant
|